Compensator Design by Pole-Zero adjustment for a Typical Position Control System

Brushless DC (BLDC) Drives find immense applications in various control systems, especially in position control. Such applications require fast dynamic response with excellent stability and steady state performance. In order to meet this requirement, brushless dc drives should respond with improved performance. In this paper, a typical brushless dc motor drive system used for control applications is analyzed. It is found that the performance of the system is sluggish. Conventional approach of classical controller design to improve the performance of the existing system is analyzed. It is inferred that the conventional approach is not suitable for the typical brushless dc motor drive system because the performance of the system has not improved to the expected level. Case study is made to find the shortcomings of the conventional approach. A new methodology for the controller design is suggested to overcome the shortcomings. Simulation results presented clearly reveal that the proposed method yields better response.